@misc{Petryk_H._Energy_1988, author={Petryk, H.}, volume={40}, number={5-6}, copyright={Creative Commons Attribution BY 4.0 license}, journal={Archives of Mechanics}, address={Warszawa}, howpublished={online}, year={1988}, publisher={Polish Scientific Publishers IFTR}, language={eng}, title={Energy estimates of the onset of instability in tension test for orthotropic materials}, type={Text}, URL={http://rcin.org.pl./Content/82371/PDF/WA727_18059_40-5-6-1988_AMS_Petryk-41.pdf}, keywords={Mechanika stosowana - czasopisma [KABA]}, }